Successfully complete all games to unlock the Final award: "Sound" option at the main menu; Credits mini-game (press A and B to shoot Arino's head. Remain idle at the "End" screen to hear Arino say various things up to thirty minutes later); and records logged of Free Play mode games.

Cosmic Gate

Hard mode

At the title screen, press Down(2), B(2), A(2), Start.

Power-up

Pause the game and press Up(2), A(2), B(2).

Haggle Man (Haguruman)

Full health

Pause the game and press Down, Right, Up, Left, B(4), A(4).

Secret power-up

Pause the game and press Down, Right, Left, Up, B(4), A(4).

Scrolls appear

Pause the game and press Up, Right, Down, Left, A(4), B(4).

Summon allies

Pause the game and press Up, Right, Down, Left, A(4), B(4).

Infinite time

At the screen before a level starts, hold Up/Left and press A + B.

Continue game

At the "Game Over" screen, hold Left and press Start.

Restore life

Enter three doors in reverse alphabetical order.

Alternate ending

Successfully complete all levels with less than five seconds on the timer.

Haggle Man 2 (Haguruman 2)

Level select

At the title screen, hold A and press Up(2), Right(3), Down(2), Left(3).

Secret power-up

Pause the game and press Up, Down, Up, Down, B(2), A(2): Note: This can only be done once per game session.

Three scrolls

Pause the game and press Down, Up, Down, Up, A(2), B(2). Note: This can only be done once per level.